441 citations · 5.2k across the 83 of their papers we have counts for
11 papers · 1 filter
Evolution of the electronic structure with size in II-VI semiconductor nanocrystals
Sameer Sapra, D. D. Sarma
In order to provide a quantitatively accurate description of the band gap variation with sizes in various II-VI semiconductor nanocrystals, we make use of the recently reported tig…
On the origin of magnetoresistance in SrFeMoO
D. D. Sarma, Sugata Ray, K. Tanaka +1
We report detailed magnetization () and magnetoresistance () studies on a series of SrFeMoO samples with independent control on anti-site defect and grain boundary d…
Metal-insulator Crossover Behavior at the Surface of NiS_2
D. D. Sarma, S. R. Krishnakumar, E. Weschke +8
We have performed a detailed high-resolution electron spectroscopic investigation of NiS and related Se-substituted compounds NiSSe, which are known to be gapped in…
Remarkable thermal stability of BF3-doped polyaniline
Debangshu Chaudhuri, Prashanth W. Menezes, D. D. Sarma
We show that the recently synthesized BF3-doped polyaniline (PANI) exhibits remarkable stability against thermal ageing. Unlike the protonated PANI, which shows rapid degradation o…
Realistic Tight Binding Model for the Electronic Structure of II-VI Semiconductors
Sameer Sapra, N. Shanthi, D. D. Sarma
We analyze the electronic structure of group II-VI semiconductors obtained within LMTO approach in order to arrive at a realistic and minimal tight binding model, parameterized to…
An accurate description of quantum size effects in InP nanocrystallites over a wide range of sizes
Sameer Sapra, Ranjani Viswanatha, D. D. Sarma
We obtain an effective parametrization of the bulk electronic structure of InP within the Tight Binding scheme. Using these parameters, we calculate the electronic structure of InP…